WO2014141204A1 - Optique pour dispositifs d'éclairage et concentrateurs solaires - Google Patents

Optique pour dispositifs d'éclairage et concentrateurs solaires Download PDF

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Publication number
WO2014141204A1
WO2014141204A1 PCT/IB2014/059842 IB2014059842W WO2014141204A1 WO 2014141204 A1 WO2014141204 A1 WO 2014141204A1 IB 2014059842 W IB2014059842 W IB 2014059842W WO 2014141204 A1 WO2014141204 A1 WO 2014141204A1
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WO
WIPO (PCT)
Prior art keywords
light
light guide
optic
reflector
illumination device
Prior art date
Application number
PCT/IB2014/059842
Other languages
English (en)
Inventor
John Paul Morgan
Michael Sinclair
Nigel Morris
Pascal Dufour
Original Assignee
Morgan Solar Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Morgan Solar Inc. filed Critical Morgan Solar Inc.
Publication of WO2014141204A1 publication Critical patent/WO2014141204A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/12—Light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
    • G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
    • H01L31/0543—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means comprising light concentrating means of the refractive type, e.g. lenses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/40—Solar thermal energy, e.g. solar towers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/52—PV systems with concentrators

Definitions

  • the present invention relates to optics.
  • Optics can be used in solar concentrators (such as those in concentrated photovoltaic systems) to concentrate sunlight onto solar energy collectors, such as photovoltaic cells. Optics can also be used in illumination devices to collimate or otherwise direct light from a light source.
  • optics for use in illumination devices can be selected for the degree of collimation, the depth of the fixture or the size of the light source used.
  • Such optics may consist of optical elements such as lenses or reflective surfaces to direct the light.
  • the light source is often an incandescent bulb, fluorescent bulb or a light emitting diode.
  • Light is typically emitted from the light source in all or most directions and interacts with the optical elements such that the light is redirected to form a beam in which all the rays of light are substantially parallel or diverge from the illumination device.
  • One widespread application for illumination devices is automotive headlamps.
  • a bulb In a typical automotive headlamp, a bulb is positioned at the focal point of a parabolic reflector. Light emanates from the bulb in all directions and some of the light impinges upon the parabolic reflector, which collimates the light into a beam.
  • the typical automotive headlamp also has a lens for dispersing the collimated light. In general these automotive headlamps have considerable depth, occupying space in the car.
  • Other exemplary applications include products such as, amongst others, stage lighting, flashlights, medical lighting and dentistry lighting.
  • Solar concentrators employ optics to concentrate sunlight received over a relatively larger area onto a relatively smaller area where a photovoltaic cell (or some other means of harvesting solar energy) can be placed.
  • a photovoltaic cell or some other means of harvesting solar energy
  • the combination of the concentrating optical elements and the smaller photovoltaic cell would, in theory, be less expensive than would be an equivalent larger photovoltaic cell required to capture the same amount of sunlight.
  • the first generations of solar concentrators were, however, quite complex and bulky, and suffered from many other drawbacks known in the art. Thus solar concentrators such as concentrated photovoltaic solar energy concentrators have not seen widespread general commercial acceptance.
  • An efficient illumination device emits a large percentage of the light output by the light source in the desired direction.
  • An efficient solar concentrator transmits a large percentage of the sunlight impinging on the input surface of the concentrator to the photovoltaic cell.
  • the design of the optic within either an illumination device or a solar concentrator can affect the size of the device, the ease of manufacture and the device's stability over time. [0008] Therefore, a slim-profile optic that provides directed light in a highly efficient manner is desirable for use in an illumination device, as is a slim-profile optic that concentrates light in a highly efficient manner for use in a solar concentrator.
  • Fig. 1 is a cross-sectional view of an embodiment of an illumination device
  • FIG. 2 is a cross-sectional view of another embodiment of an illumination device having an alternative light conditioning element
  • FIG. 3 is a cross-sectional view of an embodiment of an illumination device similar to that of Fig. 1, but having a different redirecting layer;
  • Fig. 4 is a cross-sectional view of an embodiment of an illumination device similar to that of Fig. 3 except with spaced-apart lenses;
  • FIG. 5 is a cross-sectional view of an embodiment of an illumination device having a protective coating
  • FIG. 6 is a cross-sectional view of an embodiment of an illumination device having an optical coupling layer between the light guide and the redirecting layer;
  • Fig. 7 is a cross-sectional view of an embodiment of an illumination device having optical coupling layers between the light guide and the redirecting layer, and the light guide and the reflector elements;
  • FIG. 8 is a partial cross-sectional view of an embodiment of an illumination device having a low refractive index film on step portions of the second surface of the light guide;
  • Fig. 9 is a cross-sectional view of an embodiment of an illumination device having protrusions extending from the second surface of the light guide into the reflector elements;
  • Fig. 10 is a partial cross-sectional view of another embodiment of an illumination device having protrusions extending from the second surface of the light guide into the reflector elements;
  • Fig. 11 is a cross-sectional view of an embodiment of an illumination device that is sloped
  • Fig. 12 is a cross-sectional view of another embodiment of an illumination device that is sloped
  • Fig. 13 is a cross-sectional view of an embodiment of an illumination device that has a substantially flat light guide;
  • Fig. 14 is a cross-sectional view of an embodiment of an illumination device that has reflector elements integrally formed with the light guide;
  • Fig. 15 is a perspective view of an embodiment of an illumination device having the general shape of a circular disk;
  • Fig. 16 is a perspective view of an embodiment of a cropped illumination device;
  • FIG. 17 is a perspective view of an embodiment of an illumination device having the general shape of a planar cuboid with symmetry about a central plane;
  • Fig. 18 is a perspective view of an embodiment of an illumination device having the general shape of a planar cuboid with a light source along an edge of the light guide;
  • Fig. 19A is a plan view of an embodiment of an illumination device that have an array of lens-reflector element pairs;
  • Fig. 19B is a cross-sectional view of the illumination device of Fig. 19A taken along line 19B— 19B;
  • Fig. 19C is a partial cross-sectional view of an illumination device having reflector elements that have reflective surface with a convex portion;
  • Figs. 20, 21 and 22 are cross-sectional views of curved embodiments of illumination devices;
  • Fig. 23 is an illustration of an embodiment of an illumination device on a vehicle;
  • FIG. 24 is an illustration of an electronic device employing an illumination device
  • FIG. 25 is an illustration of a lamp employing an illumination device
  • Fig. 26 is a perspective view of a window or skylight employing an illumination device
  • Fig. 27 is a cross-sectional view of the optic of Fig. 3 in a solar concentrator. DETAILED DESCRIPTION
  • the light guide 104 is made of a light transmissive material such as glass, polycarbonate or injection molded poly(methyl methacrylate) (PMMA).
  • PMMA injection molded poly(methyl methacrylate)
  • Other non- limiting examples of light transmissive materials that may be used include injection molded polymethyl methacrylimide (PMMI), Cyclo Olefin Polymers (COP), Cyclo Olefin Copolymers (COC), silicones and other light transmissive polymeric materials.
  • the light guide 104 is wedge-shaped in cross section and includes a first surface 112 and a second surface 114.
  • the second surface 114 includes a plurality of step portions 120 adjacent to a plurality of inter-step portions 122.
  • the redirecting layer 108 has an output surface 118, a plurality of plano-convex lenses 116 that are adjacent to one another, and a planar surface 148 for coupling light from the light guide 104.
  • the redirecting layer 108 can be overmolded onto the first surface 112 of the light guide 104 or alternatively bonded thereto with an optical adhesive or by laser welding.
  • the plurality of reflector elements 106 can include flat, parabolic, analytical or free-form (e.g. non-uniform rational B-spline (NURBS)) reflective surfaces 103, or a combination thereof to redirect light 131 received via the inter-step portions 122 toward the lenses 116.
  • each reflector element 106 may comprise, in cross- section, a first portion 105 and a second portion 107.
  • the first portion 105 may be flat or slightly curved (convex or concave) and the second portion 107 may be an elongated curve.
  • the first portion 105 and the second portion 107 are designed to cooperate in such a manner that light received by the second portion 107 via the inter- step portion 122 is reflected toward the first portion 105, which in turn reflects the light toward a corresponding lens 116 over a broad range of angles such that the output light 133 is substantially collimated.
  • Some light 131 transmitted through the inter-step portion 122 may also be received directly by the first portion 105, which similarly reflects the received light toward the lens 116.
  • the plurality of reflector elements 106 can be overmolded onto the second surface 114 or alternatively bonded thereto, for example with an optical adhesive or by laser welding.
  • the redirecting layer 108 and the plurality of reflector elements 106 are made of light transmissive materials, such as a silicone of lower refractive index than the material of the light guide 104.
  • the illumination device 100 can be flexible where flexible materials are used, e.g., where the light guide 104 is made of, a high refractive index, deformable silicone.
  • Light 130 from a light source 102 may be coupled into the light guide 104, at least in part, by means of a light conditioning element 110. Some of the light 130 from the light source may enter the light guide 104 directly.
  • the light conditioning element 110 may have the shape of a dome and have a reflective coating 128.
  • the light conditioning element 110 can be made of metal or any other suitable material manufactured in the shape of a dome, attachable to the light guide 104, and coated on the concave side of the dome with a reflective material.
  • the light conditioning element 110 can be an optically transmissive element integrally formed (such as by injection molding as a single piece) with the light guide 104 and coated on the convex side of the dome with a reflective material.
  • the reflective coating 128 can be made of a dielectric, or metals such as aluminum or silver.
  • the light source 102 can be the terminus of an optical fibre 102 which transmits light from a remote, originating light source.
  • the light source can be solid state lighting (SSL), such as a light-emitting diode (LED) or an organic light-emitting diode (OLED), a plasma light bulb, fluorescent light bulbs or any other type of suitable light-source.
  • SSL solid state lighting
  • Light 131 enters the light guide 104 through a light coupling surface 124 either directly (e.g., where the light emitted from the light source need not be reflected by the light conditioning element 110), or after having been reflected by the light conditioning element 110.
  • the light conditioning element 110 can have a cavity into which the light source can be inserted.
  • the light conditioning element 110 and the light guide 104 are two separate pieces, the light source can be held in place by means of a clamp or a tray (not shown).
  • the light guide 104 At least some of the light 131 is totally internally reflected by the first surface 112 and the step portions 120 of the second surface 114, and travels towards the peripheral edge 126 of the light guide 104. This light 131 eventually encounters an inter-step portion 122 of the second surface 114 and travels therethrough into a reflector element 106. Light 131 that enters the reflector element 106 via the inter- step portion 122 is then reflected by the surfaces of the reflector element 106 via total internal reflection (TIR) or, where the reflective surface 107 of the reflector element 106 is coated with a reflective material, by specular reflection.
  • TIR total internal reflection
  • the reflected light 132 is redirected away from the reflector element 106 and is transmitted towards a corresponding lens 116 in the redirecting layer 108.
  • the lens 116 may collimate the output light 133.
  • a redirecting layer 108 may not be required.
  • the illumination device 100 can be generally in the shape of a circular disk (i.e., is discoid), being revolved around a central axis 136 such that in plan view, the optically active elements (reflector elements 106, step portions 120, inter-step portions 122, and lenses 116) follow concentric circles of increasing diameter from the central axis 136 to the peripheral edge 126 (an example of which is shown in Fig. 15).
  • the optically active elements reflector elements 106, step portions 120, inter-step portions 122, and lenses 116
  • the illumination device 100 can be generally in the shape of a planar cuboid, being linearly symmetrical about a central plane 137, such that when viewed from above, the optically active elements (reflector elements 106, step portions 120, inter-step portions 122, and lenses 116) follow straight, parallel lines (examples of which are shown in Figs. 5 & 6).
  • the illumination device 100 can be a more complex, free-form shape. Examples of more complex illumination device shapes are described in further detail below.
  • the first surface 112 of the light guide 104 can be sloped with respect to the output surface 118 such that the redirecting layer 108 is wedge-shaped in cross section and the thickness of the illumination device 200 is substantially constant.
  • the substantially uniform thickness of the illumination device 200 facilitates alignment of the focal point of each lens 116 with the same portion of each of the corresponding reflector elements 106.
  • a light conditioning element 210 reflects at least some of the light 130 emitted by the light source to couple that light 130 into the light guide 104 through a light coupling area 224.
  • the light conditioning element 210 has a plurality of curved reflecting surfaces 218, 219 that reflect light 130 into the light guide 104.
  • the light conditioning element 210 can have more or fewer reflecting surfaces 218, 219 and the reflecting surfaces 218, 219 can have any shape that couples light 130 from the light source into the light guide 104.
  • the light conditioning element 210 can be integrally formed (e.g., by injection molding as a single piece) with and of the same material as the light guide 104. Alternatively, the light conditioning element 210 may be formed as a separate piece.
  • the reflective surfaces 218, 219 can be made to reflect light 130 by TIR.
  • the reflective surfaces 218, 219 are made to reflect light 130 by TIR and the light conditioning element 210 is formed as a separate piece from the light guide 104, the light conditioning element 210 is coupled to the light guide 104 by means of an optical adhesive or any other suitable bonding material or method.
  • the optically transmissive material of which the light conditioning element 210 is made can have thermally insulating properties.
  • An example of such a thermally insulating, optically transmissive material is glass.
  • the reflective surfaces 218, 219 can comprise mirrors.
  • a reflective coating comprising a dielectric, or metals such as aluminum or silver can be applied to reflective surfaces 218, 219 of the optically transmissive material.
  • the light conditioning element 210 can also be made of metal or any other suitable material, attachable to the light guide 104, and may be coated with a reflective material.
  • FIG. 3 there is shown a cross-section of an illumination device
  • the overall thickness of the redirecting layer 308 is equal to the center thickness of the lenses and the light source 102 is an LED 302.
  • the overall thickness of the illumination device 300 decreases as one moves outward from the central axis 136 or central plane 137 to the peripheral edge 126.
  • Each of the reflector elements 106 can be the same size and shape (as shown in Fig. 3), however in an alternative embodiment, the reflector elements 106 can vary in shape moving from the central axis 136 or central plane 137 to the peripheral edge 126.
  • the reflector elements 106 reflect the light 131 toward a corresponding lens 316.
  • the lenses 116 condition the light for emission from the output surface 118 such that the output light 133 is collimated or otherwise directed.
  • Fig. 4 shows a cross-sectional view of an illumination device 1900 differing from the illumination device 300 illustrated in Fig. 3 only in that the lenses 1916 are spaced-apart from one another, such that the redirecting layer 1908 is discontinuous. As the lenses 1916 may be smaller in this embodiment, a conservation of materials may be realized.
  • the exposed surface of the lenses 816 may be covered by a protective coating 842.
  • a protective coating 840 may be especially beneficial where the lenses are made of an elastomeric or deformable material such as a soft silicone.
  • the protective coating 840 can be a hydrophobic coating or mica applied to the exposed surface of the lenses 816.
  • the lenses 816 may alternatively include water/dirt-resistant nanostructures 842, such as lotus leaf nanostructures, on their exposed surfaces. These water/dirt-resistant nanostructures 842 can be molded or applied directly onto the surface of the lenses 816 during manufacturing.
  • the surface of the lenses 816 may also have anti-reflective textures thereon, such as moth eye or cone textures.
  • the anti-reflective textures may be applied to the surface of the lenses 816 or may be integrally formed thereon. It is also possible to affix a planar sheet of glass to the edges 826 of the illumination device 800, such that the glass sheet is suspended over the lenses 816 to protect the illumination device 800.
  • an illumination device 900 may include an optical coupling layer 946 between the redirecting layer 908 and the light guide 904.
  • the optical coupling layer 946 can be made of a deformable, optically transmissive material such as a silicone have a durometer less than 40 Shore A, which is deformable under an applied pressure, and can be overmolded or otherwise bonded (such as with an optically transmissive adhesive) to either the planar first surface 112 of the light guide 904 and/or to the planar surface 148 of the redirecting layer 908.
  • the deformable, optically transmissive material may also be elastomeric.
  • the optical coupling layer 946 may be made of a heat-deformable, optically transmissive material such as PMMA (e.g., EvomkTM PLEXIGLASTM or ACRYLITETM 8N) films having a pencil hardness in the range of 6B to 3H, hybrid PMMA-silica films having a pencil hardness in the range of 6B to 9H, or optical adhesives such as methyl methacrylate (MMA)-based optical adhesives.
  • PMMA e.g., EvomkTM PLEXIGLASTM or ACRYLITETM 8N
  • the optical coupling layer 946 may be formed separately from the redirecting layer 908 and the light guide 904.
  • the illumination device 900 may be assembled by clamping the redirecting layer 908 and the light guide 904 together with the optical coupling layer 946 disposed therebetween such that the optical coupling layer 946 is deformed by the pressure applied thereto.
  • the illumination device 900 optic may be thermoformed or molded at high temperatures, which may cause the layers (redirecting layer 908, light coupling element 946 and light guide 904) to become fused together to create a monolithic optic.
  • the redirecting layer 908, the optical coupling layer 946 and the light guide 908 can thus be created to facilitate the transmission of light 132 from the light guide 904 through the optical coupling layer 946 and into the redirecting layer 908.
  • the light guide 904, the redirecting layer 908 and the reflector elements 106 can be made of the same or different light transmissive materials, such as glass or an injection molded polymer.
  • the light coupling element 946 may be made of a deformable, low refractive index material such as a silicone sandwiched between a light guide 904 made of a high refractive index material such as glass or an injection molded polymer and a redirecting layer 908 made of a high refractive index material such as glass or an injection molded polymer to form the optic of the illumination device 900.
  • a deformable, low refractive index material such as a silicone sandwiched between a light guide 904 made of a high refractive index material such as glass or an injection molded polymer and a redirecting layer 908 made of a high refractive index material such as glass or an injection molded polymer to form the optic of the illumination device 900.
  • the illumination device 2300 may additionally or alternatively include an optical coupling layer 2378 between the light guide 2304 and the reflector elements 2306.
  • the optical coupling layer 2378 can be made of the same materials as optical coupling layer 946 and can similarly be overmolded or otherwise bonded to the light guide 2304 and/or the reflector elements 2306.
  • the illumination device 2400 may include a low refractive index film 2480 between each reflector element 106 and the light guide 104 to facilitate TIR at the interface between the low refractive index film 2480 and the reflector element 106.
  • Light 131 entering the reflective element 106 via the corresponding inter- step portion 122 and reflected by a second portion 107 of the reflective surface 103 of the reflector element 106 can therefore undergo TIR at the interface between the low refractive index film 2480 and the reflector element 106 and does not escape from the reflector element 106 until it is reflected by the first portion 105 of the reflective surface 103.
  • the second portion 7 may, for example, be a flat surface angled such that light is redirected to impinge upon the low refractive index film 2480 at an angle of incidence that is less than the critical angle such that the light passes through to the low refractive index film 2480 and the light guide 104 to the corresponding lens 116.
  • Fig. 9 shows a cross-section of an illumination device 700 that differs from the half cross-section of the illumination device 200 of Fig. 2 only in that the second surface 714 is not stepped, but rather is substantially flat with protrusions 722 extending therefrom, and the light conditioning element 710 is positioned along a light input edge 670 or a light input corner 1164 (described in further detail below).
  • the light conditioning element 710 has a light conditioning surface 774 that reflects light for insertion into the light guide 704.
  • An optical aperture through which light escapes from the light guide 704 is formed between each of the protrusions 722 and its corresponding reflector element 706 (similar to that formed between the inter-step portions 122 and the reflector elements 106).
  • Each protrusion 722 is encapsulated (as shown in Fig. 9) by or otherwise optically coupled to a reflector element 706.
  • Fig. 10 shows a partial cross-section of an illumination device 1000 that includes a redirecting layer 1008 that has a plurality of concavo-convex lenses 1016, a stepped light guide 1004, and a reflector layer 1054 that has a plurality of reflector elements 1006.
  • the planar surface 1048 of the redirecting layer 1008 has a plurality of concavities 1050 being the concave portions of each concavo-convex lens 1016. Separating the concavities 1050 of the redirecting layer 1008, may be a plurality of planar segments 1052.
  • the redirecting layer 1008 can be overmolded onto the first surface 112 of the light guide 1004 or alternatively bonded thereto with an adhesive or by laser welding, such that the planar segments 1052 are bonded to the planar first surface 112 of the light guide 1004.
  • the gaps 1056 remaining between the first surface 112 of the light guide 1004 and the concavities 1050 of the redirecting layer 1008 can be filled with air or any suitable light transmissive material that has a lower refractive index than the redirecting layer 1008.
  • the step portions 1020 of the second surface 114 of the light guide 1004 need not be parallel to the first surface 112 of the light guide 1004 as shown in the figures described above, but rather can be sloped as shown in Fig. 10.
  • the light guide 1004 can also have protrusions 1060 similar to those of Fig. 9 extending from the second surface 114.
  • the plurality of reflector elements 1006 are provided in a reflector layer 1054 which may be overmolded onto the second surface 114 of the light guide 1004 or alternatively bonded thereto with an optical adhesive or by laser welding.
  • the reflector layer 1054 thereby includes a plurality of reflector elements 1006 and a plurality of secondary reflector sections 1058 joining the reflector elements 1006.
  • the redirecting layer 1008 and the reflector layer 1054 can be made of a silicone of lower refractive index than the material of the light guide 1004.
  • the illumination device 1000 can be flexible where flexible materials are used, e.g., a high refractive index silicone is used for the light guide 1004.
  • light emitted by a light source is coupled into the light guide 1004 where it is totally internally reflected towards a peripheral edge by the first surface 112 of the light guide 1004, by the step portions 1020 of the light guide 1004, and/or by the secondary reflector sections 1058 of the reflector layer 1054.
  • Total internal reflection can occur on the first surface 112 of the light guide 1004 both where it interfaces with a gap 1056, and where it interfaces with a planar segment 1052 of the redirecting layer 1008.
  • Each inter-step portion 1022 formed at least in part on a surface of a protrusion 1060, allow a wider range of angles of light to enter through the aperture that is formed between the inter-step portions 1022 and the reflector elements 1006 than would be possible without the protrusion 1060.
  • Light entering the reflector element 1006 is then reflected by the surfaces of the reflector elements 1006 such that beams of substantially collimated light are transmitted to the concave portions (cavities) 1050 of the redirecting layer 1008.
  • Fig. 11 shows a cross-section of an illumination device 2000 that has a sloped orientation with respect to the direction of the output light 133. If the illumination device 2000 is oriented to emit output light 133 in an upward direction as shown in Fig. 11, then the illumination device 2000 can be said to have an upward slope from the light source 102 toward the peripheral edge 2026.
  • the redirecting layer 2008 generally increases in thickness from the edge closest to the light source 102 to the peripheral edge 2026 and can have a sloped planar surface 2048. In order to maintain the orientation of the lenses 2016, the lenses 2016 can be stepped as shown in Fig. 11.
  • the first surface 2012 of the light guide 2004 may also be sloped to complement the planar surface 2048 of the redirecting layer 2008.
  • the step portions 2020 of the second surface 2014 of the light guide 2004 may be parallel to the planar surface 2048 and may therefore also be sloped.
  • the sloped configuration of the illumination device 2000 due to the sloped configuration of the illumination device 2000, light received by the reflector elements 2006 via the inter-step portions 2022 may only impinge upon the first portion 2005 of the reflective surface 2003, in which case only the first portion 2005 needs to be reflective.
  • the sloped configuration of the illumination device 2000 may also facilitate the optimization of the design of the light conditioning element 2010 for efficient transmission of light from the light source 2002 into the light guide 2004.
  • Fig. 12 shows a cross-section of an illumination device 2100 that differs from the illumination device 2000 of Fig. 11 only in that the lenses 2116, their corresponding reflector elements 2106 and the distance between a lens 2116 and its corresponding reflector element 2106 are scaled in inverse proportion with their distance from the light source 102 and has an optical coupling layer 2146 similar to that of the illumination device 900 of Fig. 6.
  • the plane of the output surface 2118 can therefore be made perpendicular to the direction of the output light 133.
  • Such scaling of the optical elements may help to make the output light 133 more uniform in intensity and collimation across the output surface 2118.
  • Fig. 13 is a cross-section of an illumination device 2200 that is similar to the illumination device 100 of Fig. 1, except that the light guide 2204 of the illumination device 2200 comprises a substantially flat sheet of light transmissive material.
  • the light transmissive material of the redirecting layer 2208 can have an index of refraction that is higher than the surrounding environment of the illumination device 2200 (typically a gas such as air) but lower than the light transmissive material of the reflector elements 2206 and the light guide 2204.
  • Light 131 can therefore be guided within the light guide 2204 by total internal reflections on the first surface 2212 of the light guide 2204 and portions of the second surface 2214 exposed to the surrounding environment.
  • light 131 travelling within the light guide 2204 that encounters a portion of the second surface 2214 to which an reflector element 2206 is optically bonded can be transmitted into the reflector element 2206 and reflected by the reflecting surface 2207 toward the corresponding lens 2216 (without undergoing TIR at the interface between the planar surface 2248 of the redirecting layer 2208 and the first surface 2212 of the light guide 2204), which may collimate the light.
  • Fig. 14 shows a cross-section of an illumination device 2700 that differs from the illumination device 2200 of Fig. 13 only in that the reflector elements 2706 are integrally formed with the light guide 2704 and there is an optical coupling layer 2788 similar to the optical coupling layer 946 of Fig. 6.
  • the optical coupling layer 2788 is made of a light transmissive material that has an index of refraction that is lower than the index of refraction of the light guide 2704 such that light 131 can be guided within the light guide 2704 by total internal reflection even if the index of refraction of the redirecting layer 2708 is not lower than that of the light guide 2704.
  • this illumination device 2700 may be simpler than other illumination devices because it comprises only two separate parts - the redirecting layer 2708 and the light guide 2704 with integrally formed reflector elements 2706.
  • the two parts can be assembled into an illumination device 2700 using an optical adhesive as the optical coupling layer 2788.
  • Fig. 15 is a perspective view of an illumination device 400 having the general shape of a circular disk and having circular symmetry about a central axis 136.
  • the redirecting layer 408 is discoid and comprises a plurality of lenses 416 concentrically disposed.
  • the lenses 416 may be cylindrical lenses forming concentric rings about the central axis 136 of the illumination device 400.
  • the light guide 404 is also disk-shaped and has substantially the same diameter as the redirecting layer 408.
  • the light guide 404 has a centrally located light coupling surface 424, which may, for example, have the shape of a truncated cone, or a cylinder.
  • the plurality of reflector elements are concentrically disposed.
  • the disk-shaped illumination device 400 can be cropped to make the illumination device 400 a tileable shape, such as square or hexagonal, while conserving its revolved geometry.
  • the light conditioning element 410 also has a revolved geometry, whether it be a light conditioning element that guides light by TIR or specular reflections.
  • the light source 102 is a point source. As shown in Fig. 15, the light source 102 can be the terminus of an optical fibre 402 which transmits light from a remote, originating light source.
  • the illumination device 400 may be cropped to make an illumination device 1100 rectangular in shape with the axis of rotational symmetry 1162 at one corner 1164 of the illumination device 1100, as shown in Fig. 16.
  • the redirecting layer 1108 is generally in the shape of a planar cuboid and comprises a plurality of lenses 1116 coaxially disposed.
  • the lenses 1116 can be cylindrical lenses forming concentric circular arcs centred on the axis of symmetry 1162.
  • the light guide 1104 also has the shape of a planar cuboid and has substantially the same width and length as the redirecting layer 1108.
  • the light guide 1104 has a light coupling surface 1124 located in the vicinity of the axis of symmetry 1162.
  • the light coupling surface 1124 can have the shape of a truncated cone, or a cylinder.
  • the light source 1102 is disposed along the central axis 1162, and is optically and mechanically bonded to the light coupling surface 1124, for example by means of an optical adhesive.
  • the plurality of reflector elements 1106 are likewise coaxially disposed. In this embodiment, light propagates in the light guide towards the outer edges 1166.
  • Fig. 17 there is shown a perspective view of an illumination device 500 having the general shape of a planar cuboid with height Z, relatively small as compared to its width X and length Y.
  • the optically active elements lie along straight and parallel lines, parallel to the central plane 137.
  • the illumination device 500 can have a longitudinal section along width X similar to any of the figures described above showing cross-sections of illumination devices.
  • the illumination device 500 has two redirecting layers 508, and two light guides 504, each disposed on either side of the central plane 137.
  • the illumination device 500 can be symmetric about the central plane 137 as shown in Fig. 17, but need not be symmetric.
  • Each light guide 504 has a light coupling surface 524 in the vicinity of the central plane 137 to receive light from the light source 502.
  • the light coupling surfaces 524 complement the shape of the profile of the light source 502, such that the light source 502 can be held in place by the light coupling surfaces 524.
  • the light source 502 which can be a fluorescent tube, an LED tube, a longitudinal light conditioning element optically coupled to a point source such as the terminus of an optical fibre, or any other type of longitudinal light source, is disposed lengthwise along the central plane 137.
  • the illumination device 500 can be manufactured as a single piece with a cavity located longitudinally along the central plane 137 for insertion of the light source 502.
  • each side of the illumination device 500 (comprising a redirecting layer 508, a light guide 504 and a plurality of redirecting elements 506) can be manufactured separately and then bonded together by means of an optical adhesive or any other suitable material or method, including clamping.
  • Cuboid shaped illumination devices 500 may be cropped to make the illumination device any desirable overall shape, such as hexagonal or circular discs, keeping the optically active elements straight and parallel.
  • the illumination device 500 may include a secondary optical element to aid in coupling light from the light source 502 to the light guides 504.
  • an illumination device 600 may include one redirecting layer 508, one light guide 504, and one set of reflector elements 506, such that the light source 602, runs along light coupling surface 624 of the illumination device 600, as shown in Fig. 18.
  • the exposed surface of the light source 602 can be coated with a reflective material 672 such that some, preferably most or most preferably, all, light is reflected towards the light guide 504.
  • a tubular cavity or other means for retaining the light source 602 along the light coupling surface 624 can be provided with a reflective peripheral surface for reflecting light towards the light guide 504.
  • a light conditioning element optically coupled to a point source may extend longitudinally across the light input edge 670 such that the light from the light source is coupled into the light guide 504 through the light coupling surface 624.
  • the light source 602 can cover the entire light coupling surface 724.
  • the illumination device 2500 shown in Fig. 19A has an array of lens- reflector element pairs.
  • the redirecting layer 2508 includes a substrate sheet 2586 made of light transmissive material and the array of lenses 2516 extending from the first surface 2587 of the substrate sheet 2586.
  • the lenses 2516 may be integrally formed with the substrate sheet 2586, may be 3D printed or overmolded onto the substrate sheet 2586, or may be otherwise optically bonded to the first surface 2587 (e.g., using an optical adhesive, by laser welding or any other means known in the art).
  • the lenses may, for example, be spherical caps or quarter-spherical caps (not shown).
  • the light guide 2504 can comprise a substantially flat sheet of light transmissive material.
  • a light conditioning element 2510 may also be provided to evenly distribute light in all directions within the light guide 2504 and thereby even out the intensity of light impinging upon the reflector elements 2506 at any given distance from the light source 102.
  • the light source 102 is the terminus of an optical fibre.
  • the light conditioning element 2510 may be integrally formed with the light guide 2504, may be 3D printed or overmolded onto the light guide 2504, or may be otherwise optically bonded to the second surface 2514 of the light guide 2504 (e.g., using an optical adhesive, by laser welding or any other means known in the art).
  • a cavity may be provided in the light guide 2504 and the light conditioning element 2510 may be inserted into the cavity.
  • the light source may be effectively extended into the light guide 2504 in the latter embodiment, it may be easier to direct light toward the nearest corners of the illumination device 2500 where the light source is located toward the centre of one side of the illumination device 2500 as shown in Fig. 19A. Producing a more uniform distribution of light may be facilitated by placing the light source 102 and the light conditioning element 2510 at a corner of the illumination device 2500 or toward the centre of the illumination device 2500.
  • the array of reflector elements 2506 may be integrally formed with the light guide 2504, may be 3D printed or overmolded onto the light guide 2504, or may be otherwise optically bonded to the second surface 2514 of the light guide 2504 (e.g., using an optical adhesive, by laser welding or any other means known in the art).
  • the reflector elements 2506 can be nubs and can each have a reflective surface 2503 having a first portion 2505 that is, for example, a concave reflector 2505a (as shown in Fig. 19B) or convex reflector (as shown in Fig. 19C).
  • the reflector elements 2506 may be nonuniform in shape, size and/or orientation so that each reflector element 2506 reflects approximately the same amount of light toward its corresponding lens 2516 such that the output light 133 and output from each lens 2516 is substantially uniform in intensity across the output surface 2518.
  • the illumination device 2500 may include an optical coupling layer 2589 between the second surface 2588 of the substrate sheet 2586 and the first surface 2512 of the light guide 2504 similar to the optical coupling layer 946 of the illumination device 900 of Fig. 6.
  • the optical coupling layer 2589 has an index of refraction that is lower than that of the light guide 2504 such that light 131 is reflected at the first surface 2512 of the light guide 2504 by TIR.
  • the illuminations devices 1200, 1300, 1400 can be curved as shown in Figs. 20-22.
  • the light emitted from the illumination device 1200, 1300 may be perpendicular to the output surface 1218, 1318 such that the output light 133 diverges where the illumination device 1200, 1300 has a convex curve (as shown in Fig. 20 and the portion of the illumination device 1300 closest to the light source 102 of Fig. 21) and converges where the illumination device 1300 has a concave curve (as in the portion of the illumination device 1300 furthest away from the light source 102 of Fig. 21).
  • the light 133 emitted from the illumination device 1400 may be collimated to form a beam (as shown in Fig. 22) even though of the illumination device 1400 is curved. Collimation may be achieved by orienting the active optical elements of the illumination device 1400 such that the light emitted from each lens 1416 is parallel and not necessarily normal to the output surface 1418.
  • the illumination device 1200, 1300, 1400 will retain its shape.
  • the cross-section of the illumination device may therefore have the shape of an arc of fixed radius as shown in Figs. 20 and 22, or may have the shape of a combination of one or more curves as shown in Fig. 21.
  • the light guide 1204, 1304 and redirecting layer 1208, 1308, are made of flexible materials such as silicone
  • the optic of the illumination device 1200, 1300 can be flexible.
  • the illumination device 1200, 1300 can be made entirely of flexible materials in which case the whole of the illumination device 1200, 1300 is flexible.
  • the embodiments shown in Figs. 20, 21, 22 include a light source 102 at one end of the illumination device 1200, 1300, 1400 but the light source 102 could be disposed toward the centre of the illumination device such as shown in Figs. 1-4, 15 and 17.
  • a vehicle 1555 may include an illumination device 1400 as part of its headlight assembly. When illuminated, the illumination device 1400 directs light forwardly from the vehicle. The light from the illumination device 1400 may be completely or partially collimated to provide a beam of light or focused to provide a broader or narrower beam of light.
  • an electronic device 1666 such as a mobile communication device, tablet or laptop computer, monitor or sign, may include an illumination device 1600 to backlight a display 1668.
  • the illumination device 1600 may be planar cuboid with cropped circular lenses similar to that shown in Fig. 15.
  • the illumination device 1600 may have linear lenses (not shown) similar to that shown in Fig. 17.
  • a single light source 102 may serve to illuminate the display.
  • the depth in the electronic device 1666 required to accommodate the illumination device 1600 may only be a depth of Z as indicated in Fig. 17 and as such allow the design of an electronic device 1666 with a slim profile.
  • an illumination device 1700 may be used in a luminaire such as a lamp 1777.
  • the illumination device 1700 may be a circular disk such as that shown in Fig. 15 with the light source 102 disposed at the centre of the circular disk of the illumination device 1700.
  • use of the illumination device 1600 may reduce the amount of power required to illuminate a given area as compared to using a conventional luminaire.
  • any of the illumination devices 2600 described above can be used as windows or skylights 2666 because they are made of translucent materials. In daylight, the window or skylight 2666 can transmit sunlight and when there is insufficient sunlight, the illumination device 2600 can be turned on to illuminate a space.
  • Light source 102 could, for example, be an optical fibre optically coupled to a corner of the optic of the illumination device 2600.
  • Fig. 27 shows a cross-section of a solar concentrator 2800 comprising the optic of the illumination device 300 of Fig. 3 with the light source 102 replaced by a photovoltaic cell 2884.
  • Sunlight 2833 impinging upon the lenses 316 is focused by each lens 316 onto the first portion 105 of the reflecting surface 103 of its corresponding reflector element 106.
  • the reflecting surface 103 reflects the light into the light guide 104 via the inter-step portion 122 of the second surface 114 of the light guide 104.
  • Light 131 is then guided by the light guide 104 by TIR at the first surface 112 of the light guide 104 and the step portions 120 of the second surface 114 of the light guide 104 toward the photovoltaic cell 2884.
  • a light conditioning element 2882 may be provided in the optical path between the light guide 104 and the photovoltaic cell 2884 to further concentrate and redirect light from the light guide 104 onto the photovoltaic cell 2884.
  • the light conditioning element 2882 may be similar to the light conditioning elements 110, 210 of the illumination devices described above.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
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  • General Engineering & Computer Science (AREA)
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Abstract

Optique à utiliser dans des dispositifs d'éclairage et concentrateurs solaires, l'optique possédant un guide de lumière, une couche de réorientation comprenant une pluralité de lentilles et une pluralité d'éléments réfléchissants. Dans les dispositifs d'éclairage, la lumière partant d'une source de lumière entre dans le guide de lumière et y est guidée jusqu'à ce qu'elle sorte dans un élément réfléchissant, qui réfléchit au moins une partie de la lumière reçue par l'élément réfléchissant vers une lentille correspondante en vue de son émission depuis le dispositif d'éclairage. Dans les concentrateurs solaires, la lumière solaire est reçue par les lentilles, qui concentrent la lumière solaire sur les surfaces réfléchissantes des éléments réfléchissants. La surface réfléchissante de chaque élément réfléchissant redirige la lumière dans le guide de lumière, qui guide la lumière vers un collecteur d'énergie solaire, tel qu'une cellule photovoltaïque. La lumière provenant du guide de lumière peut être dirigée sur le collecteur d'énergie solaire par un élément de conditionnement de lumière.
PCT/IB2014/059842 2013-03-15 2014-03-14 Optique pour dispositifs d'éclairage et concentrateurs solaires WO2014141204A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110244440A (zh) * 2019-05-10 2019-09-17 哈尔滨工业大学 一种集光器的侧向集光系统

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9019614B2 (en) * 2011-10-26 2015-04-28 Google Inc. Display device with image depth simulation
FR3029038B1 (fr) 2014-11-26 2016-12-30 Commissariat Energie Atomique Procede de fabrication d'un concentrateur photovoltaique a structure optique munie d'un double etages de lentilles optiques
CN104503141A (zh) * 2014-12-31 2015-04-08 深圳市华星光电技术有限公司 一种液晶显示器背光模组及液晶显示器
US9818017B2 (en) * 2015-07-09 2017-11-14 Gingy Technology Inc. Fingerprint identification module
US10049257B2 (en) 2015-07-09 2018-08-14 Gingy Technology Inc. Fingerprint identification module
US20170250301A1 (en) 2016-02-29 2017-08-31 Zafer Termanini Solar panel with optical light enhancement device
JP6605766B2 (ja) * 2016-07-01 2019-11-13 シグニファイ ホールディング ビー ヴィ ３ｄ印刷反射器及びその製造方法
JP6744196B2 (ja) * 2016-10-31 2020-08-19 スタンレー電気株式会社 車両用灯具
CN206361642U (zh) * 2016-11-24 2017-07-28 法雷奥照明湖北技术中心有限公司 光束调整装置和用于车灯的光学装置
US10330902B1 (en) 2017-06-16 2019-06-25 Dbm Reflex Enterprises Inc. Illumination optics and devices
GB201715884D0 (en) * 2017-09-29 2017-11-15 Sola Daniel John Peter Support member for a load-bearing structure
FR3072901B1 (fr) 2017-10-31 2019-11-08 Commissariat A L'energie Atomique Et Aux Energies Alternatives Dispositif de moulage de lentilles et procede de fabrication de lentilles
CN108227167A (zh) * 2017-12-05 2018-06-29 杜志刚 一种玻璃空心微珠双向聚光板
WO2019228815A1 (fr) 2018-05-31 2019-12-05 Signify Holding B.V. Lumière se propageant depuis une led à guide de lumière

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090064993A1 (en) * 2007-09-10 2009-03-12 Banyan Energy, Inc. Solar energy concentrator
WO2010033859A2 (fr) * 2008-09-19 2010-03-25 The Regents Of The University Of California Systeme et procede de capture d'energie solaire et procede de fabrication associe
WO2010124028A2 (fr) * 2009-04-21 2010-10-28 Vasylyev Sergiy V Systèmes de collecte de lumière et d'éclairage à guide d'onde plan

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5838403A (en) 1996-02-14 1998-11-17 Physical Optics Corporation Liquid crystal display system with internally reflecting waveguide for backlighting and non-Lambertian diffusing
JP3457591B2 (ja) 1999-10-08 2003-10-20 インターナショナル・ビジネス・マシーンズ・コーポレーション 液晶表示装置
WO2003077019A1 (fr) * 2002-03-14 2003-09-18 Nec Corporation Modulateur-afficheur optique, procede de fabrication, et afficheur ainsi equipe
US7391939B1 (en) 2004-11-17 2008-06-24 Williams Raymond W Optical apparatus
KR101174773B1 (ko) * 2005-06-29 2012-08-20 엘지디스플레이 주식회사 프리즘 시트와 이를 이용한 백 라이트 유닛 및 프리즘시트의 제조방법
JP4671344B2 (ja) 2005-08-03 2011-04-13 シチズン電子株式会社 導光板及びそれを用いたバックライト装置
JP4709230B2 (ja) * 2006-01-23 2011-06-22 富士フイルム株式会社 面状照明装置
WO2008008994A2 (fr) 2006-07-14 2008-01-17 Light Prescriptions Innovators, Llc Film améliorant la luminosité
EP2439565A3 (fr) 2006-07-21 2013-04-10 Fujifilm Corporation Plaque guide lumineux unitaire, unité de plaque guide lumineux, dispositif d'éclairage planaire et dispositif d'affichage à cristaux liquides
WO2008080996A1 (fr) 2006-12-29 2008-07-10 Oy Modines Ltd Structure de couplage interne pour application d'éclairage
US7855763B2 (en) * 2007-02-19 2010-12-21 Mitsubishi Electric Corporation Backlight device and transmission type display apparatus
FR2914754B1 (fr) 2007-04-05 2009-07-17 Commissariat Energie Atomique Dispositif de concentration de lumiere plan a epaisseur reduite
KR20100016586A (ko) 2007-04-17 2010-02-12 코닌클리즈케 필립스 일렉트로닉스 엔.브이. 조명 장치
US7530721B2 (en) 2007-04-18 2009-05-12 Skc Haas Display Films Co., Ltd. Double-sided turning film
CN101680631B (zh) 2007-05-01 2014-04-09 摩根阳光公司 照明装置
US7991257B1 (en) 2007-05-16 2011-08-02 Fusion Optix, Inc. Method of manufacturing an optical composite
US8412010B2 (en) * 2007-09-10 2013-04-02 Banyan Energy, Inc. Compact optics for concentration and illumination systems
CA2698284C (fr) 2007-09-10 2013-06-25 Banyan Energy, Inc. Dispositif optique compact pour la concentration, l'agregation et l'eclairement d'une energie lumineuse
WO2009063416A2 (fr) 2007-11-13 2009-05-22 Koninklijke Philips Electronics, N.V. Dispositifs optiques collecteurs minces et efficaces pour système solaire
US20090126792A1 (en) 2007-11-16 2009-05-21 Qualcomm Incorporated Thin film solar concentrator/collector
WO2010040053A1 (fr) 2008-10-02 2010-04-08 Richard Morris Knox Concentrateur d'énergie solaire
ES2364665B1 (es) 2008-11-12 2012-05-23 Abengoa Solar New Technologies, S.A. Sistema de captación y concentración de luz.
US8506148B2 (en) * 2008-11-20 2013-08-13 Sharp Kabushiki Kaisha Lighting device, display device and television receiver
US8817377B2 (en) 2009-05-14 2014-08-26 Sunboost Ltd Light collection system and method
CN102483483A (zh) 2009-06-24 2012-05-30 罗切斯特大学 梯级式光收集和会聚系统、及其组件和方法
US8189970B2 (en) 2009-06-24 2012-05-29 University Of Rochester Light collecting and emitting apparatus, method, and applications
WO2011022631A2 (fr) 2009-08-20 2011-02-24 Light Prescriptions Innovators, Llc Concentrateurs et collimateurs à lignes d'écoulement étagées
US20110044582A1 (en) 2009-08-21 2011-02-24 Microsoft Corporation Efficient collimation of light with optical wedge
WO2011038127A2 (fr) 2009-09-24 2011-03-31 Genie Lens Technologies Llc Suivi d'un concentrateur à plaquette optique
US8917447B2 (en) * 2010-01-13 2014-12-23 3M Innovative Properties Company Microreplicated film for attachment to autostereoscopic display components
JP4985788B2 (ja) 2010-01-13 2012-07-25 オムロン株式会社 面光源装置及び液晶表示装置
CN102411164B (zh) * 2010-07-23 2013-07-31 颖台科技股份有限公司 导光装置及具有导光装置的背光模块与液晶显示器
KR101775068B1 (ko) 2010-11-19 2017-09-06 리얼디 스파크, 엘엘씨 방향성 평판 조명기
WO2012075384A2 (fr) 2010-12-04 2012-06-07 3M Innovative Properties Company Ensemble d'éclairage et son procédé de formation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090064993A1 (en) * 2007-09-10 2009-03-12 Banyan Energy, Inc. Solar energy concentrator
WO2010033859A2 (fr) * 2008-09-19 2010-03-25 The Regents Of The University Of California Systeme et procede de capture d'energie solaire et procede de fabrication associe
WO2010124028A2 (fr) * 2009-04-21 2010-10-28 Vasylyev Sergiy V Systèmes de collecte de lumière et d'éclairage à guide d'onde plan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110244440A (zh) * 2019-05-10 2019-09-17 哈尔滨工业大学 一种集光器的侧向集光系统

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